TROPICAL POLYPORES 97 



encircling the hymenium; context soft-corky, multizonate, avel- 

 laneous, fulvous next to the tubes, 3-5 mm. thick; tubes indis- 

 tinctly stratified, 3-5 mm. long each season, avellaneous 

 within, becoming grayish in the older layers because of 

 the white mycelium that fills them, mouths circular to slightly 

 angular, whitish-stuffed when young, regular, 3-4 to a mm., 

 edges nearly white to grayish-avellaneous, finally umbrinous 

 with age; spores ovoid, brown, 8 X 6/t; stipe tubercular, um- 

 bonate-affixed, often branched, slightly darker than the pileus, 

 0.5-1 X 0.5-1.5 cm. 



Found once on a mango log near Santiago de las Vegas, Cuba, 

 and once in Porto Rico. 



3. GANODERMA SUBFORNICATUM Murrill 



Pileus subcircular, rigid, nearly plane above and below, 8 X 

 9-11 X 2-3 cm.; surface glabrous, uneven, many times con- 

 centrically sulcate, finally zonate, radiate-rugose, dark-bay- 

 brown, laccate, shining; margin truncate, concolorous, free be- 

 hind ; context thin, with horny radiations, slightly zonate, fulvous, 

 5-10 mm. thick; tubes perennial, long and slender, I cm. in 

 length each season, smoky-fuliginous, mouths circular, 4 to a mm., 

 stuffed when young, edges obtuse to acute, entire, fuliginous; 

 spores globose, smooth, brown, 4/1; stipe sublateral, umbonate- 

 affixed, scutate at the base, compressed, 3-7 X 1.5-2.5 cm., 

 expanding into the pileus, which it resembles in color, surface, 

 and context. 



Occasional on dead wood in British Honduras. 



4. GANODERMA PULVERULENTUM Murrill 



Pileus rigid, corky, dimidiate to fan-shaped, applanate, sub- 

 imbricate, usually very large, 10-20 X 15-30 X 2-5 cm.; surface 

 glabrous, laccate, lustrous, latericeous to bay, becoming dull- 

 brown with age, broadly sulcate, azonate, uneven, at times 

 proliferous; margin cremeous, pulverulent, subacute, rarely 

 rounded, smooth, undulate to lobed; context punky, zonate, 

 isabelline to umbrinous above, dark-fulvous to bay below, 5-10 

 mm. thick; tubes perennial, 5-10 mm. long each season, avel- 

 laneous within, mouths angular, 4 to a mm., citrinous-melleous, 

 becoming darker with age, umbrinous when bruised, entirely 

 covered at first with a creamy-white powder, which easily rubs 

 off on the fingers, edges acute, entire; spores ovoid, brown, 

 9 X 5M5 stipe short, often obsolete, subcylindric, eccentric to 

 lateral, 2-3 X 2-3 cm., expanding above, laccate, glabrous, bay 



